.\" $OpenBSD: EVP_des_cbc.3,v 1.1 2019/03/21 12:54:37 schwarze Exp $
.\" full merge up to:
.\"   OpenSSL EVP_desx_cbc.pod 8fa4d95e Oct 21 11:59:09 2017 +0900
.\" selective merge up to:
.\"   OpenSSL EVP_des.pod 7c6d372a Nov 20 13:20:01 2018 +0000
.\"
.\" This file was written by Ronald Tse <ronald.tse@ribose.com>
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.Dd $Mdocdate: March 21 2019 $
.Dt EVP_DES_CBC 3
.Os
.Sh NAME
.Nm EVP_des_cbc ,
.Nm EVP_des_cfb ,
.Nm EVP_des_cfb1 ,
.Nm EVP_des_cfb8 ,
.Nm EVP_des_cfb64 ,
.Nm EVP_des_ecb ,
.Nm EVP_des_ofb ,
.Nm EVP_des_ede ,
.Nm EVP_des_ede_cbc ,
.Nm EVP_des_ede_cfb ,
.Nm EVP_des_ede_cfb64 ,
.Nm EVP_des_ede_ecb ,
.Nm EVP_des_ede_ofb ,
.Nm EVP_des_ede3 ,
.Nm EVP_des_ede3_cbc ,
.Nm EVP_des_ede3_cfb ,
.Nm EVP_des_ede3_cfb1 ,
.Nm EVP_des_ede3_cfb8 ,
.Nm EVP_des_ede3_cfb64 ,
.Nm EVP_des_ede3_ecb ,
.Nm EVP_des_ede3_ofb ,
.Nm EVP_desx_cbc
.Nd EVP DES cipher
.Sh SYNOPSIS
.In openssl/evp.h
.Ft const EVP_CIPHER *
.Fn EVP_des_cbc void
.Ft const EVP_CIPHER *
.Fn EVP_des_cfb void
.Ft const EVP_CIPHER *
.Fn EVP_des_cfb1 void
.Ft const EVP_CIPHER *
.Fn EVP_des_cfb8 void
.Ft const EVP_CIPHER *
.Fn EVP_des_cfb64 void
.Ft const EVP_CIPHER *
.Fn EVP_des_ecb void
.Ft const EVP_CIPHER *
.Fn EVP_des_ofb void
.Ft const EVP_CIPHER *
.Fn EVP_des_ede void
.Ft const EVP_CIPHER *
.Fn EVP_des_ede_cbc void
.Ft const EVP_CIPHER *
.Fn EVP_des_ede_cfb void
.Ft const EVP_CIPHER *
.Fn EVP_des_ede_cfb64 void
.Ft const EVP_CIPHER *
.Fn EVP_des_ede_ecb void
.Ft const EVP_CIPHER *
.Fn EVP_des_ede_ofb void
.Ft const EVP_CIPHER *
.Fn EVP_des_ede3 void
.Ft const EVP_CIPHER *
.Fn EVP_des_ede3_cbc void
.Ft const EVP_CIPHER *
.Fn EVP_des_ede3_cfb void
.Ft const EVP_CIPHER *
.Fn EVP_des_ede3_cfb1 void
.Ft const EVP_CIPHER *
.Fn EVP_des_ede3_cfb8 void
.Ft const EVP_CIPHER *
.Fn EVP_des_ede3_cfb64 void
.Ft const EVP_CIPHER *
.Fn EVP_des_ede3_ecb void
.Ft const EVP_CIPHER *
.Fn EVP_des_ede3_ofb void
.Ft const EVP_CIPHER *
.Fn EVP_desx_cbc void
.Sh DESCRIPTION
These functions provide the DES encryption algorithm in the
.Xr evp 3
framework.
.Pp
.Fn EVP_des_cbc ,
.Fn EVP_des_cfb1 ,
.Fn EVP_des_cfb8 ,
.Fn EVP_des_cfb64 ,
.Fn EVP_des_ecb ,
and
.Fn EVP_des_ofb
provide DES in CBC, CFB with 1-bit shift, CFB with 8-bit shift,
CFB with 64-bit shift, ECB, and OFB modes.
.Fn EVP_des_cfb
is an alias for
.Fn EVP_des_cfb64 ,
implemented as a macro.
.Pp
.Fn EVP_des_ede_cbc ,
.Fn EVP_des_ede_cfb64 ,
.Fn EVP_des_ede_ecb ,
and
.Fn EVP_des_ede_ofb
provide two key triple DES in CBC, CFB with 64-bit shift, ECB, and OFB modes.
.Fn EVP_des_ede_cfb
is an alias for
.Fn EVP_des_ede_cfb64 ,
implemented as a macro.
.Fn EVP_des_ede
is an alias for
.Fn EVP_des_ede_ecb .
.Pp
.Fn EVP_des_ede3_cbc ,
.Fn EVP_des_ede3_cfb1 ,
.Fn EVP_des_ede3_cfb8 ,
.Fn EVP_des_ede3_cfb64 ,
.Fn EVP_des_ede3_ecb ,
.Fn EVP_des_ede3_ofb
provide three key triple DES in CBC, CFB with 1-bit shift, CFB with 8-bit
shift, CFB with 64-bit shift, ECB, and OFB modes.
.Fn EVP_des_ede3_cfb
is an alias for
.Fn EVP_des_ede3_cfb64 ,
implemented as a macro.
.Fn EVP_des_ede3
is an alias for
.Fn EVP_des_ede3_ecb .
.Pp
.Fn EVP_desx_cbc
provides the DES-X encryption algorithm in CBC mode.
It uses a key length of 128 bits and acts on blocks of 128 bits.
.Sh RETURN VALUES
These functions return an
.Vt EVP_CIPHER
structure that provides the implementation of the symmetric cipher.
.Sh SEE ALSO
.Xr evp 3 ,
.Xr EVP_EncryptInit 3
.Sh HISTORY
.Fn EVP_des_cbc ,
.Fn EVP_des_cfb ,
.Fn EVP_des_ecb ,
.Fn EVP_des_ofb ,
.Fn EVP_des_ede ,
.Fn EVP_des_ede_cbc ,
.Fn EVP_des_ede_cfb ,
.Fn EVP_des_ede_ofb ,
.Fn EVP_des_ede3 ,
.Fn EVP_des_ede3_cbc ,
.Fn EVP_des_ede3_cfb ,
and
.Fn EVP_des_ede3_ofb
first appeared in SSLeay 0.5.1.
.Fn EVP_desx_cbc
first appeared in SSLeay 0.6.2.
These functions have been available since
.Ox 2.4 .
.Pp
.Fn EVP_des_ede_ecb
and
.Fn EVP_des_ede3_ecb
first appeared in OpenSSL 0.9.7 and have been available since
.Ox 3.2 .
.Pp
.Fn EVP_des_cfb1 ,
.Fn EVP_des_cfb8 ,
.Fn EVP_des_cfb64 ,
.Fn EVP_des_ede_cfb64 ,
.Fn EVP_des_ede3_cfb1 ,
.Fn EVP_des_ede3_cfb8 ,
and
.Fn EVP_des_ede3_cfb64
first appeared in OpenSSL 0.9.7e and have been available since
.Ox 3.8 .
